Siren Shouts when system restarts..

[Manas]

Hi all,
 
I have installed a MinderPro board at a client. Whenever power supply recovers from a black out, Hooter(100dB) shouts  for a moment. This is irritating the client especially at night time. Is there any way to overcome this?
 
Regards,
Manas
 
 

[ident]

That is the correct behaviour for MinderPro. It tests the siren when power is applied
Your problem is not with this, it is that you do not have a back up battery (12V 7 AH) see example here
A backup battery is mandatory for an alarm system. An alarm system cannot go dead when the power goes off, otherwise it is not much use

[Manas]

Ok. I thought I can control stratup behaviour. Anyways, we are going to install battery backup for the system.

Thanks!